Safety razor



Feb. 14, 1933. R. E. THOMPSON SAFETY RAZOR Filed Nov. 17, 1930 PimmteclFeb. 14, 1933 UNITED lSTATES PATENT OFFICE RALPH E. THOMPSON, OFBBOOKLINE, MASSACHUSETTS, ASSTGNOB To ornmiT'rE SAFETY nAzon COMPANY, orBOSTON, MASSACHUSETTS, A CORPORATION or DELAWARE SAFETY RAZORApplication mea November 11'l 193C. serial No. 496,171,

This invention relates to safety razors, and relates -more particularlyto safety razors of the Gillettetype in which a transversely ilexibleblade is clamped between the cap and guard members of a razor.

In the ordinary safety razor of this 'type, the cap member is providedwith positloning studs which extend into apertures in .the blade andalso into apertures in the guard member, thus serving not onlyl' toposition the blade, but also to position t e guard member to the capmember.

An object of this invention is to provlde a safety razor with means forpositioning the cap and guard members together, and separate means forpositioning the blade. In this way I am enabled to locate the cap andguard membersaccurately and reliably by means that are not subject towear by the hardened blades in their repeated removals and replacements.

In one embodiment of this invention, the cap member is provided with twosets of positioning pins. One set of positioning pins extends throughopenings having excesslve clearance in the blade, and into close fittingOpenings in the guard member. This set of pins serves to position thecap and guard members together. The other set of pins extends into closefitting openings in the blade and serves to position the blade.

The invention will now be explained with reference to the drawing, ofwhich:

Fig. 1 is a side view in section of a safety razor cap, blade, and guardin assembled relation;

Fig. 2 is a side, exploded view of a cap, blade, and guard;

Fig. 3 is a plan view of a blade;

Fig. 4 is a plan view of the side of the cap member which contacts withthe blade when the razor is assembled;

Fig. 5 is a plan View of a guard member, and

Fig. 6 is an end view partially in section of an assembled razor.

The blade 6 is provided with the four small positioning or locatingopenings 7, into which the four short positioning pins 8 on the capmember 9 extend, and which are a close fit for these positioning pins.The blade is also provided with the four larger'openings 10,

through which Athe positioning pins 11 of the i cap member 9 are adaptedto pass with ex'- cessive clearance. The guard member 12 is providedwiththe four small positioning Openings 13, into which the positioning pins11 of the cap member 9 extend, when the razor is assembled.

When the razor is assembled, the blade is placed on the cap memberso'that the blade positioning pins 8 contact closely with the sides ofthe openings'7 and position the blade accurately upon the cap member,The positioning pins 11 on the cap member, which are longer than thepositioning pins 8, pass through vthe Openings 10 in the blade withexcessive clearance, since the openings 10 have much larger diametersthan the pins`11.' The blade and cap member, positioned together, arethen placed on'the guard 12, the lower portions of the positioning pins11 passing into close contact with the sides of the openereas in theembodiment of the invention illustrated the positioning pins have beenshown as forming a part of the cap member, it should be understood thatthe positioning pins could be formed on or a part of the guard memberwith positioning Openings in the cap member.

Whereas one embodiment of the invention has been described for thepurpose of illustration, it vshould be; understood that the invention isnot limited to the exact details de-l scribed, as many departures may bemade by those skilled in the art without departing from the spirit ofthe invention.

What is claimed is:

1. A safety razor blade having a 'central aperture and in additionthereto a pair of small internal positioning apertures and a pair oflarge clearance a ertures L mmediately adjacent a shaving e ge, thedistance between the large apertures being greater than 5 the distancebetween the small apertures.

2. A. safety razor comprising, in combination, a transversely exiblerazor blade having a small locating aperture and a large clearanceaperture adjacent a shaving edge,

clamping members between which said blade is iexed, a pair of.positioning pins 0n one ofsaid members, one of said pins being adaptedto be positioned in said larger aperture in said blade with clearance,and the other of said pins being adapted to fit into said small locatingaperture in said blade,'and an aperture in the other of said membersinto which said pin, which asses through said larger aperture, lits,and) thereby accurately locates said members with respect to each other.

3. A safety razor comprising, in combination, a transversely flexibleblade having a small positioning aperture and a large clearanceaperture, clamping members between which said blade is exed, a long anda short positioning pin in one of said members, said long pin beingadapted to pass through said larger aperture in said bladeto fit into asmaller aperture in the. other of said members to position said memberstog-ether, and said short pin being adapted to lit into said smallaperture in. sa1d blade to position said'blade between said members. Y v

4. A safetyrazor comprising cap and guard members havin co-operatingpins and slots for accurately etermning their relative p0- sition, meansfor clamping the two members together, a blade internally perforated toreceive said pins with clearance thereby elimi- 4 nating wear thereonand having also bladelocating apertures therein, and separate studs onone of said members arranged to co-operate with said apertures inlocating the blade.

5. A safety razor blade having corner recesses which define an elongatedintermediate unsharpened portion and longitudinal sharpened edgesterminated by said recesses, a relatively large hole adjacent to theinner corner of each recess anda smaller hole `aced inwardly therefrom,the larger ho es being clearance holes and the smaller holes serving Ato locate the blade. y

Signed at Boston, Massachusetts,l this 15th day of November, 1930.

RALPH E. frnoixzrrsoi. Y

